Collapsible periscope



FIG. 1 is a front perspective view of a collapsible periscope embodying my new design, shown in an extended position;

FIG. 2 is a side elevational view thereof;

FIG. 3 is an elevational view from the opposite side of FIG. 1;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a view similar to FIG. 1, but shown in a collapsed position; and

FIG. 6 is a rear perspective view thereof. 

The ornamental design for a collapsible periscope, as shown and described. 